Pacemaker
101atrial synchronous ventricular pacemaker — a dual chamber cardiac pacemaker that senses atrial activity and delivers a ventricular stimulus after a preset interval; used in patients with impaired atrioventricular conduction but normal sinus node function. Called also VAT p. See also… …
102atrioventricular junctional pacemaker — an ectopic pacemaker occurring in the atrioventricular junction …
103atrioventricular (AV) sequential pacemaker — an artificial cardiac pacemaker used in patients with abnormal sinus node function and impaired AV conduction; it senses ventricular, and sometimes atrial, activity and in addition to stimulating the atrium also stimulates the ventricle after an… …
104bipolar pacemaker — an implanted pacemaker in which the lead contains both electrodes, anode and cathode, and is thus a complete circuit …
105cardiac pacemaker — the group of cells rhythmically initiating the heartbeat, characterized physiologically by a slow loss of membrane potential during diastole. Usually the pacemaker site is the sinoatrial node. See also artificial cardiac p …
106DDD pacemaker — an artificial cardiac pacemaker that can sense and pace both the atria and ventricles; it is capable of operating in both triggered and inhibited modes as necessary …
107DDDR pacemaker — a universal pacemaker that is responsive to the patient s respiratory rate and thus to exercise and metabolic needs …
108DDI pacemaker — a type of atrioventricular sequential pacemaker that delivers impulses to the atrium and ventricles on the basis of sensed ventricular and atrial activity, although the latter can only inhibit atrial impulses and cannot trigger ventricular… …
109dual chamber pacemaker — a pacemaker having two leads, one in the atrium and one in the ventricle, so that electromechanical synchrony between the chambers can be approximated …
110DVI pacemaker — a type of atrioventricular sequential pacemaker that delivers impulses to the atrium and ventricle on the basis of sensed ventricular activity only. Cf. DDI p. and DDD p …
